Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7c91f2cb22b8182…

MALICIOUS

PDF

73.4 KB Created: 2021-05-31 09:14:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: ca2d513d5e3e5e4cc2a573b72dd228d7 SHA-1: d9fb8bbe90f2da54396df162d512ceeefeb11128 SHA-256: e7c91f2cb22b81827f3c3aa1bad0b98f3d1c09bf45f264d56305d5e2e6902365
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://druttle.ru/strik?utm_term=transformaci%25C3%25B3n+de+sociedades+mercantiles+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4459929/normal_602d0ea814893.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450337/normal_605d353ac4b6a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486356/normal_6013a192b4b3c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463809/normal_605acd7b75cc3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481515/normal_601ddeb624136.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4369930/normal_60b1ab2618321.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4473916/normal_60b40d820e912.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449615/normal_6044a093bc3fa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489598/normal_5ff88ffbe29eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375075/normal_606c9cfc53e52.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476595/normal_6046a3c75e526.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423442/normal_5fc6145fa46eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450732/normal_6063f18c131eb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481064/normal_5fdd775033212.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444852/normal_5fddbd8d4cf5c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d015899b-bf69-4db8-af50-0ca39252fc0d/85985117526.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba428a76-5e28-49c2-89ec-0c710e037bf9/grand_theft_auto_5_apk__obb_free_download_for_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eaddcdda-9624-4523-9e33-46dd206b29b4/kazm_karabekirin_hatralar.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dff5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFF5 5388 bytes
SHA-256: 9fe1078cba24afb6c3627a51bd3b9d631fec90ba8b7536f9689ac316b57d8181
font_01_sfnt_off0000f1ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1EF 11096 bytes
SHA-256: 876de89545a4a4ad3ed8a9cd375ef60e55b5ae352441a7e1b4cba54b4e3fc777

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